The temperature and humidity controller adopts advanced imported microprocessors to detect the temperature and humidity of the environment in real time. When the temperature or humidity of the environment does not meet the set requirements, corresponding heating, cooling, humidification, dehumidification and other equipment are activated to keep the temperature or humidity of the environment within a set range; Characterized by high measurement accuracy and anti-interference ability; It can be widely used in high and low voltage switchgear, box type substations, terminal boxes and other power control equipment, as well as in baking rooms, grain depots, warehouses, machine rooms, breeding, textile industries and other occasions that require automatic dehumidification or humidification and automatic cooling or heating.